In the greater part of Egypt rain never falls, and if it were not for the Nile the country would be little better than a desert. But every year, at exactly the same time, near the end of June, the river begins to rise and overflow its banks. For three months it continues to swell and spread, until it floods nearly the whole of the valley in which it flows. It then begins to fall as steadily as it has risen, and retires gradually into its proper channel, leaving the land which it has overflowed covered with fertile mud, which has been brought down from the interior of the continent, where the Nile rises. This rich soil and the annual flooding of the valley by the river have made Egypt one of the most fertile countries in the world. The Egyptian farmer knows well the advantages which he reaps from the overflowing of the Nile, and he cuts many canals to lead the water to his fields, and builds dams to retain it when the river goes down. But the overflowing of the river, even when helped by canals and dams, is not enough for the proper irrigation of the land, and the Egyptian farmers and field-labourers have to spend much of their time in raising water from the river, or the canals, and distributing it over the fields, especially upon the higher ground, which the annual flood does not reach. Along the banks of the river, especially in Upper Egypt, may be seen great numbers of machines, which are used for raising water from the river into reservoirs, from which it is distributed through the fields. The commonest of these machines is the shadoof. It is a sort of balance, with a weight at one end and a cord and bucket at the other. The arm of the balance rests upon a bar of wood, which is supported by two wooden posts, the whole resembling the horizontal bar of a gymnasium. The posts are about five feet high and two or three feet apart, and they are set up on the top of a bank, close to the edge, so that the end of the arm which bears the bucket may project over the water. This arm is made out of a slender branch of a tree, and is fastened to the horizontal bar by loops of cord. Its thicker end is loaded with a large, round ball of mud, while the other carries a long cord, or even a slender stick, at the end of which is the bucket, or bowl, in which the water is raised. This bucket is not made of iron, but of basketwork, usually covered with leather or cloth. The man who works the shadoof stands near the water's edge, below the slender arm of the balance. He pulls down the cord to which the bucket is attached, until the bucket dips into the water and is filled, while at the same time he raises the lump of mud at the other end of the balance. When the bucket is filled, he lifts it up, and empties it into a little tank higher up in the bank, perhaps at the height of his head. The heavy weight at the other end of the balance aids him a great deal in lifting the bucket, even if it does not quite balance it. When the bank is high, and the water has to be raised some distance, several shadoofs are employed. They are arranged in stages, or steps, one above the other; the second from the bottom takes its water from the reservoir, into which it has been emptied by the first, and the third from the reservoir of the second, and so on. Drawing water with the aid of the shadoof is said to be very hard work, especially in so hot a country as Egypt. The shadoof was used thousands of years ago, just as it is to-day, as we know by the pictures of it which are still to seen painted upon the walls of some of the ruins of ancient Egyptian buildings. Another machine used for the same purpose is the sakiyeh, or draw-wheel. It consists of a horizontal axle, with a wheel at each end. One of these wheels overhangs the water of a river, a canal, or a well, and over it there passes a long, hanging loop of cords, to which a number of earthen pots are fastened. As the axle and the wheel go round, the pots on the cords are drawn over the wheel, and made to move in a circle like the buckets of a dredging-machine. The lower end of the loop of pots dips in the water, and each pot, as it passes through the water, is filled. It is then slowly drawn up by the turning wheel, and as it passes over the wheel, and is tilted over, it empties the water into a tank, or spout, and passes on downwards, empty, to the river again to take up a new supply. The wheel at the other end of the axle is connected with a large horizontal wheel, or 'gin,' to which a pair of oxen may be yoked. These animals, walking round and round, turn the large wheel, which, by means of cogs, turns the wheel upon the nearer end of the axle, and so turns the wheel bearing the pots. The machinery is very rough, and squeaks and groans in the loudest manner when it is at work; but it raises a great quantity of water, and is not easily put out of order. |